package com.mac.intellect_flow.framework.interceptor;

import cn.hutool.json.JSONUtil;
import com.mac.intellect_flow.annotation.RepeatSubmit;
import com.mac.intellect_flow.enums.ResultCodeEnum;
import com.mac.intellect_flow.reply.R;
import com.mac.intellect_flow.util.web.WebFrameworkUtils;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;


/**
 * 防止重复提交拦截器
 *
 * @author mac
 */
public abstract class AbstractRepeatSubmitInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (handler instanceof HandlerMethod) {
            HandlerMethod handlerMethod = (HandlerMethod) handler;
            Method method = handlerMethod.getMethod();
            RepeatSubmit annotation = method.getAnnotation(RepeatSubmit.class);
            if (annotation != null) {
                if (this.isRepeatSubmit(request, annotation)) {
                    R error = R.error(ResultCodeEnum.INTERNAL_SERVER_ERROR.getCode(), annotation.message());
                    WebFrameworkUtils.renderString(response, JSONUtil.toJsonStr(error));
                    return false;
                }
            }
            return true;
        } else {
            return true;
        }
    }

    /**
     * 验证是否重复提交由子类实现具体的防重复提交的规则
     *
     * @param request 请求信息
     * @param annotation 防重复注解参数
     * @return 结果
     * @throws Exception
     */
    public abstract boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit annotation);
}
